News Details
Nylon (PA) flame retardant
2017-10-18 17:08:02
Nylon (PA) flame retardant
Polyamide, commonly known as nylon (PA), is a thermoplastic resin that contains the repetitive amide group (-nhco -). Nylon is widely used in various fields due to its excellent mechanical properties, electric properties, heat resistance, toughness, oil resistance, abrasion resistance, self-lubricating and chemical resistance.
Without modification of nylon flame retardant performance is poorer, the vertical combustion can only achieve UL94 level V - 2, oxygen index is about 24, and produce drip in the combustion process, belong to the combustible material, in use process easy to cause fire. Especially in the field of electronic products, the fire caused by nylon is countless, loss is bigger, therefore, nylon (PA) flame retardant become mutual concern and research topic in today's academia and industry.
Glass fiber reinforcing filler series materials of different content of glass fiber, kuangfen enhanced filling PA materials, including glass fiber reinforced filled PA6 and glass fiber reinforced fill PA66 two big series, high strength, high rigidity, high heat resistance, good dimensional stability and forming process. It can be formed by injection, molding, extrusion, etc., widely used in automobile, electric appliance and other industries.
The effect of moisture content in the raw material for nylon contain strong polarity amide in the molecular structure (CONH -) groups, exposed in the air, easy with the water molecules to form hydrogen bond in the air, water imbibition is bigger, which makes the nylon easy to hydrolysis reaction under high temperature molten state, reduce the molecular weight, and thus reduce its mechanical properties, therefore, in the processing before using nylon raw materials must be fully dry. Dry conditions:
Drum wind drying temperature 100 ℃ ~ 100 ℃ for 6 ~ 8 h
Vacuum drying temperature to 85 + 5 ℃ for 6 ~ 8 h
The processing temperature affects the processing temperature of extrusion molding process. The temperature of the feed section is slightly lower than that of the melting point of raw materials, so that the nylon is semi-molten. This is to ensure that the material can be stabilized into the screw and can be transported along the axis of the screw. High compression temperature higher than the melting point, generally about 10 ~ 15 ℃, make it completely molten; In this section, the nylon melt is subjected to the shear mixing of the screw, which produces a larger shear and friction heat.
Tert Benzyl diphenyl phosphate (BPDP-71B) Packing:
Net weight 200KG galvanized iron drum (a small cabinet to play with 16 tons), 1000KGIB barrel (a small cabinet installed 18 tons) or 23 tons ISOTANK.
Shipping port: Shanghai port
Price Quotations Valid: 15 days
Jincang time: 15 days (commodity inspection declaration)
Export authority: the company import and export right
Tert Benzyl diphenyl phosphate (BPDP-71B) use
Tert-butyl phosphate diphenyl phosphate, tert-butylated triphenyl phosphate is halogen-free organophosphorus flame retardant, using a new, excellent performance of phosphorus flame retardant, with excellent thermal stability and hydrolysis Sex. Its high thermal stability makes it as an engineering plastic flame retardant at the same time, can improve the plastic melting performance. Tert-butylated triphenyl phosphate for the liquid, in the resin can make its durability and hydrolysis stability is better, and easy to produce the table and stress cracking. It is widely used in flame retardant PV (, cellulose resin, into the rubber, phenolic resin, epoxy resin, polyene unit fiber.
The temperature of the metering section is close to or slightly lower than that of the compression section. In this area, the nylon melt is evenly heated and is easy to achieve stable flow. The temperature of the nose is slightly lower than that of the metering section, which is basically close to the melting point temperature, so as to avoid the thickness of the products due to the fracture of the melt. The cooling medium temperature and cooling speed should also be adjusted appropriately.
Some liquid flame retardants can improve the fluidity of the melt. Flame retardant belongs to small molecules, it to join in the nylon resin matrix can plasticizing effect, thus improve the liquidity, the typical flame retardant MCA, is a flame retardant and good lubricant.
The addition of nylon (PA) flame retardant may result in mechanical properties of nylon impact strength and bending strength. But as more and more high to the requirement of all kinds of engineering plastics, satisfying products at the same time, the performance of flame retardant to reinforced nylon, glass fiber is used to enhance the nylon is currently widely used a way, glass fiber enhanced nylon products with high strength, heat distortion temperature, molding shrinkage rate is low, less liquidity, greatly improve the impact strength and other properties.
The development trend of nylon flame retardant. The nylon (PA) flame retardant sort is more, bromine flame retardants such as bromine biphenyl ether, ten bromine biphenyl ethane, phosphate flame retardants, such as red phosphorus, melamine, melamine urea acid salt (MCA), solid flame retardants such as antimony trioxide, zinc borate, etc., some of the synergistic effect between flame retardants.
The halogen flame retardant system is the most widely used in nylon (PA) flame retardant system. Containing halogen flame retardant system is widely used abroad is poly styrene brominated, it is two br the homopolymer of styrene, excellent thermal stability and good mixed with nylon fusibility, and in the process of processing has good liquidity, but its light stability and high cost in domestic is not widespread use; Is widely used in domestic is ten bromine biphenyl ether, because its bromine content is higher, adding quantity is little, good flame retardant effect and lower cost, many enterprises to become the domestic priority chosen the most economical type of flame retardant, but its combustion release harmful gas and toxic substances DPO (so-called dioxins) have great harm to human body.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
Polyamide, commonly known as nylon (PA), is a thermoplastic resin that contains the repetitive amide group (-nhco -). Nylon is widely used in various fields due to its excellent mechanical properties, electric properties, heat resistance, toughness, oil resistance, abrasion resistance, self-lubricating and chemical resistance.
Without modification of nylon flame retardant performance is poorer, the vertical combustion can only achieve UL94 level V - 2, oxygen index is about 24, and produce drip in the combustion process, belong to the combustible material, in use process easy to cause fire. Especially in the field of electronic products, the fire caused by nylon is countless, loss is bigger, therefore, nylon (PA) flame retardant become mutual concern and research topic in today's academia and industry.
Glass fiber reinforcing filler series materials of different content of glass fiber, kuangfen enhanced filling PA materials, including glass fiber reinforced filled PA6 and glass fiber reinforced fill PA66 two big series, high strength, high rigidity, high heat resistance, good dimensional stability and forming process. It can be formed by injection, molding, extrusion, etc., widely used in automobile, electric appliance and other industries.
The effect of moisture content in the raw material for nylon contain strong polarity amide in the molecular structure (CONH -) groups, exposed in the air, easy with the water molecules to form hydrogen bond in the air, water imbibition is bigger, which makes the nylon easy to hydrolysis reaction under high temperature molten state, reduce the molecular weight, and thus reduce its mechanical properties, therefore, in the processing before using nylon raw materials must be fully dry. Dry conditions:
Drum wind drying temperature 100 ℃ ~ 100 ℃ for 6 ~ 8 h
Vacuum drying temperature to 85 + 5 ℃ for 6 ~ 8 h
The processing temperature affects the processing temperature of extrusion molding process. The temperature of the feed section is slightly lower than that of the melting point of raw materials, so that the nylon is semi-molten. This is to ensure that the material can be stabilized into the screw and can be transported along the axis of the screw. High compression temperature higher than the melting point, generally about 10 ~ 15 ℃, make it completely molten; In this section, the nylon melt is subjected to the shear mixing of the screw, which produces a larger shear and friction heat.
Tert Benzyl diphenyl phosphate (BPDP-71B) Packing:
Net weight 200KG galvanized iron drum (a small cabinet to play with 16 tons), 1000KGIB barrel (a small cabinet installed 18 tons) or 23 tons ISOTANK.
Shipping port: Shanghai port
Price Quotations Valid: 15 days
Jincang time: 15 days (commodity inspection declaration)
Export authority: the company import and export right
Tert Benzyl diphenyl phosphate (BPDP-71B) use
Tert-butyl phosphate diphenyl phosphate, tert-butylated triphenyl phosphate is halogen-free organophosphorus flame retardant, using a new, excellent performance of phosphorus flame retardant, with excellent thermal stability and hydrolysis Sex. Its high thermal stability makes it as an engineering plastic flame retardant at the same time, can improve the plastic melting performance. Tert-butylated triphenyl phosphate for the liquid, in the resin can make its durability and hydrolysis stability is better, and easy to produce the table and stress cracking. It is widely used in flame retardant PV (, cellulose resin, into the rubber, phenolic resin, epoxy resin, polyene unit fiber.
The temperature of the metering section is close to or slightly lower than that of the compression section. In this area, the nylon melt is evenly heated and is easy to achieve stable flow. The temperature of the nose is slightly lower than that of the metering section, which is basically close to the melting point temperature, so as to avoid the thickness of the products due to the fracture of the melt. The cooling medium temperature and cooling speed should also be adjusted appropriately.
Some liquid flame retardants can improve the fluidity of the melt. Flame retardant belongs to small molecules, it to join in the nylon resin matrix can plasticizing effect, thus improve the liquidity, the typical flame retardant MCA, is a flame retardant and good lubricant.
The addition of nylon (PA) flame retardant may result in mechanical properties of nylon impact strength and bending strength. But as more and more high to the requirement of all kinds of engineering plastics, satisfying products at the same time, the performance of flame retardant to reinforced nylon, glass fiber is used to enhance the nylon is currently widely used a way, glass fiber enhanced nylon products with high strength, heat distortion temperature, molding shrinkage rate is low, less liquidity, greatly improve the impact strength and other properties.
The development trend of nylon flame retardant. The nylon (PA) flame retardant sort is more, bromine flame retardants such as bromine biphenyl ether, ten bromine biphenyl ethane, phosphate flame retardants, such as red phosphorus, melamine, melamine urea acid salt (MCA), solid flame retardants such as antimony trioxide, zinc borate, etc., some of the synergistic effect between flame retardants.
The halogen flame retardant system is the most widely used in nylon (PA) flame retardant system. Containing halogen flame retardant system is widely used abroad is poly styrene brominated, it is two br the homopolymer of styrene, excellent thermal stability and good mixed with nylon fusibility, and in the process of processing has good liquidity, but its light stability and high cost in domestic is not widespread use; Is widely used in domestic is ten bromine biphenyl ether, because its bromine content is higher, adding quantity is little, good flame retardant effect and lower cost, many enterprises to become the domestic priority chosen the most economical type of flame retardant, but its combustion release harmful gas and toxic substances DPO (so-called dioxins) have great harm to human body.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
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